Calling WDJ from WDA application

Hi experts,
Can anyone please tell me that how 2 call a WDJ application from a WDA application. Please explain in detail as i am complete novice in this field.
thnx.

Hi Thomas and experts,
I have requirement where i need to call WD java standard application.
My requirement : I am displaying teamview in my MSS through OADP by using WD ABAP...
                             Initial Screen displays columns like Position, Employee name , Job ...etc
                                 when manager select position in teamview ....it has to check whether positions region went live or not.
                                I) IF position region went live then it has to open 3rd party tool and pass parameters(Here i am open 3rd      party URL and passing parameters)
Here my requirement, 2)Already we have standard WDJ application which is using as of now, so if positions region has not gone live then i have to call standard WDJ application with passing parameter and skipping initial screen which is displaying teamview and continue with position details
Is this possible through portal which explained above. can any one suggest me how to proceed .
Thanks in advance...
Regards,
Farooq

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